Epictetus seems puzzled by why Epicureans should care enough about philosophy to actually try to convince others of the truth of their views.

Philosophical discourses of Epictetus as recorded by his affectionate student, Arrian. One main precept expounded is that we do not fear events but rather our thoughts about those events.
00 - Introduction and Preface
01 - Book I I. Of the Things Which Are in Our Power, and Not in Our Power
02 - II. How a Man on Every Occasion Can Maintain His Proper Character
03 - III. How a Man Should Proceed from the Principles of God Being the Father of All Men to the Rest
04 - IV. Of Progress or Improvement
05 - V. Against the Academics
06 - VI. Of Providence
07 - VII. Of the Use of Sophistical Arguments and Hypothetical and the Like
08 - VIII. That the Faculties Are Not Safe to the Uninstructed
09 - IX. How from the Fact That We Are Akin to God a Man May Proceed to the Consequences
10 - X. Against Those Who Eagerly Seek Preferment at Rome
11 - XI. Of Natural Affection
12 - XII. Of Contentment
13 - XIII. How Everything May Be Done Acceptably to the Gods
14 - XIV. That the Deity Oversees All Things
15 - XV. What Philosophy Promises
16 - XVI. Of Providence
17 - XVII. That the Logical Art is Necessary
18 - XVIII. That We Ought Not to Be Angry with the Errors (Faults) of Others
19 - XIX. How We Should Behave to Tyrants
20 - XX. About Reason, How I Contemplates Itself
21 - XXI. Against Those Who Wish to Be Admired
22 - XXII. On Precognition
23 - XXIII. Against Epicurus
24 - XXIV. How We Should Struggle with Circumstances
25 - XXV. On the Same
26 - XXVI. What is the Law of Life
27 - XXVII. In How Many Ways Appearances Exist, and What Aids We Should Provide Against Them
28 - XXVIII. That We Ought Not to Be Angry with Men; and What are the Small and the Great Things Among Men
29 - XXIX. On Constancy (Or Firmness)
30 - XXX. What We Ought to Have Ready in Difficult Circumstances
31 - Book II I. That Confidence (Courage) is Not Inconsistent with Caution
32 - II. Of Tranquility (Freedom from Perturbation)
33 - III. To Those Who Recommend Persons to Philosophers
34 - IV. Against a Person Who Had Once Been Detected in Adultery
35 - V. How Magnanimity Is Consistent with Care
36 - VI. Of Indifference
37 - VII. How We Ought to Use Divination
38 - VIII. What Is the Nature ('H Ουσία) Of the Good
39 - IX. That When We Cannot Fulfill That Which the Character of a Man Promises, We Assume the Character of a Philosopher
40 - X. How We May Discover the Duties of Life from Names
41 - XI. What the Beginning of Philosophy Is
42 - XII. Of Disputation or Discussion
43 - XIII. On Anxiety (Solicitude)
44 - XIV. To Naso
45 - XV. To or Against Those Who Obstinately Persist in What They Have Determined
46 - XVI. That We Do Not Strive to Use Our Opinions About Good and Evil
47 - XVII. How We Must Adapt Preconceptions to Particular Cases
48 - XVIII. How We Should Struggle Against Appearances
49 - XIX. Against Those Who Embrace Philosophical Opinions Only in Words
50 - XX. Against the Epicureans and the Academics
51 - XXI. Of Inconsistency
52 - XXII. On Friendship
53 - XXIII. On the Power of Speaking
54 - XXIV. To (Or Against) a Person Who Was One of Those Who Were Not Valued (Esteemed by Him)
55 - XXV. That Logic is Necessary
56 - XXVI. What Is the Property of Error
57 - Book III I. Of Finery in Dress
58 - II. In What a Man Ought to Be Exercised Who Has Made Proficiency and That We Neglect the Chief Things
59 - III. What Is the Matter on Which a Good Man Should be Employed, and in What We Ought Chiefly to Practice Ourselves
60 - IV. Against a Person Who Showed His Partisanship in an Unseemly Way in a Theatre
61 - V. Against Those Who on Account of Sickness Go Away Home
62 - VI. Miscellaneous
63 - VII. To the Administrator of the Free Cities Who Was an Epicurean
64 - VIII. How We Must Exercise Ourselves Against Appearances (Φαντασίασ)
65 - IX. To A Certain Rhetorician Who Was Going Up to Rome on a Suit
66 - X. In What Manner We Ought to Bear Sickness
67 - XI. Certain Miscellaneous Matters
68 - XII. About Exercise
69 - XIII. What Solitude Is, and What Kind of Person a Solitary Man Is
70 - XIV. Certain Miscellaneous Matters
71 - XV. That We Ought to Proceed with Circumspection to Everything
72 - XVI. That We Ought with Caution to Enter into Familiar Intercourse with Men
73 - XVII. On Providence
74 - XVIII. That We Ought Not to Be Disturbed by Any News
75 - XIX. What is the Condition of a Common Kind of Man and of a Philosopher
76 - XX. That We Can Derive Advantage from All External Things
77 - XXI. Against Those Who Readily Come to the Profession of Sophists
78 - XXII. About Cynicism
79 - XXIII. To Those Who Read and Discuss for the Sake of Ostentation
80 - XXIV. That We Ought Not to Be Moved by a Desire of Those Things Which Are Not in Our Power
81 - XXV. To Those Who Fall Off (Desist) from Their Purpose
82 - XXVI. To Those Who Fear Want
83 - Book IV I. About Freedom
84 - II. On Familiar Intimacy
85 - III. What Things We Should Exchange for Other Things
86 - IV. To Those Who Are Desirous of Passing Life in Tranquility
87 - V. Against the Quarrelsome and Ferocious
88 - VI. Against Those Who Lament Over Being Pitied
89 - VII. On Freedom From Fear
90 - VIII. Against Those Who Hastily Rush Into the Use of the Philosophic Dress
91 - IX. To a Person Who Had Been Changed to a Character of Shamelessness
92 - X. What Things We Ought to Despise, and What Things We Ought to Value
93 - XI. About Purity (Cleanliness)
94 - XII. On Attention
95 - XIII. Against or to Those Who Readily Tell Their Own Affairs

The Enchiridion (also translated as “Handbook” or “Manual”) of Epictetus is a short collection of Stoic precepts compiled by Arrian, a student of Epictetus. Epictetus (c. 50 – 135 AD) was a Greek philosopher and a champion of Stoicism, a philosophy dedicated to tranquility of the mind and soul via practical, actionable advice. Popular in the ancient and medieval world, it has even found favor in the contemporary military; fighter pilot James Stockdale attributed his survival of over seven years as a prisoner of war to the way of thinking contained in this short work.

Aphorisms from the Stoic Greek.
01 - Aphorisms 001-021
02 - Aphorisms 022-040
03 - Aphorism 041-065
04 - Aphorisms 066-090
05 - Aphorism 091-115
06 - Aphorism - 116-140
07 - Aphorisms 141 - 175
08 - Aphorisms - 176-188