Man learns through experience, and the spiritual path is full of different kinds of experiences. He will encounter many difficulties and obstacles, and they are the very experiences he needs to encourage and complete the cleansing process.
Sai Baba

There are very few human beings who receive the truth, complete and staggering, by instant illumination. Most of them acquire it fragment by fragment, on a small scale, by successive developments, cellularly, like a laborious mosaic.
Anais Nin

To accuse others for one's own misfortunes is a sign of want of education. To accuse oneself shows that one's education has begun. To accuse neither oneself nor others shows that one's education is complete.
Epictetus

My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all.
Stephen Hawking