Laughter is not at all a bad beginning for a friendship, and it is far the best ending for one. 
In the end, we will remember not the words of our enemies, but the silence of our friends. 
The proper office of a friend is to side with you when you are in the wrong 
A friend who is far away is sometimes much nearer than one who is at hand. Is not the mountain far more awe-inspiring and more clearly visible to one passing through the valley than to those who inhabit the mountain? 
The greatest sweetener of human life is friendship. To raise this to the highest pitch of enjoyment, is a secret which but few discover. 
Writing is a solitary occupation. Family, friends, and society are the natural enemies of the writer. He must be alone, uninterrupted, and slightly savage if he is to sustain and complete an undertaking.