Nothing can bring you happiness but yourself.

I appeal from your customs. I must be myself. I cannot break myself any longer for you, or you. If you can love me for what I am, we shall be happier. If you cannot, I will still seek to deserve that you should. I must be myself. I will not hide my tastes or aversions. I will so trust that what is deep is holy, that I will do strongly before the sun and moon whatever inly rejoices me and the heart appoints. If you are noble, I will love you; if you are not, I will not hurt you and myself by hypocritical attentions

Self-trust is the first secret of success

Our strength grows out of our weaknesses

I appeal from your customs. I must be myself. I cannot break myself any longer for you, or you. If you can love me for what I am, we shall be happier. If you cannot, I will still seek to deserve that you should. I must be myself. I will not hide my tastes or aversions. I will so trust that what is deep is holy, that I will do strongly before the sun and moon whatever inly rejoices me and the heart appoints. If you are noble, I will love you; if you are not, I will not hurt you and myself by hypocritical attentions. If you are true, but not in the same truth with me, cleave to your companions; I will seek my own. I do this not selfishly but humbly and truly. It is alike your interest, and mine, and all men’s, however long we have dwelt in lies, to live in truth. Does this sound harsh to-day? You will soon love what is dictated by your nature as well as mine, and if we follow the truth it will bring us out safe at last.—But so may you give these friends pain. Yes, but I cannot sell my liberty and my power, to save their sensibility. Besides, all persons have their moments of reason, when they look out into the region of absolute truth; then will they justify me and do the same thing.
The populace think that your rejection of popular standards is a rejection of all standard, and mere antinomianism; and the bold sensualist will use the name of philosophy to gild his crimes. But the law of consciousness abides.

The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.