It is easy to hate and it is difficult to love. This is how the whole scheme of things works. All good things are difficult to achieve; and bad things are very easy to get. Confucius
It is a persistent evil to persecute a man who belongs to the grace of God. It is a calamity without remedy to hate the happy. Cyprian
The man of knowledge must be able not only to love his enemies but also to hate his friends. Friedrich Nietzsche
The worst sin toward our fellow creatures is not to hate them, but to be indifferent to them: that's the essence of inhumanity. George Bernard Shaw
Not to talk is to hate. Kikuyu Proverb
There is a time to love, and a time to hate. Romanian Proverb