Faith in humanity is faith in the unlimited creation capacity of the human race. But, naturally, this faith has only a motivational and binding character because how the human race realizes its potential is a different question.
A mature personality clearly recognizes the importance of Humanity. Guarding it meticulously, they understand that life's complexities are no excuse to demean it with even a single action.
The main duty of Homo Sapiens is the preservation and development of the most valuable product of its culture, its main and inalienable property – Humaneness.