A forced faithfulness is a bitter fruit for all concerned.

Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.

It is certainly true that principles cannot be more securely founded than on experience and consciously clear thinking.

But if the longing for the achievement of the goal is powerfully alive within us, then shall we not lack the strength to find the means for reaching the goal and for translating it into deeds.

Once you can accept the universe as matter expanding into nothing that is something, wearing stripes with plaid comes easy.

But the personality that finally emerges is largely formed by the environment in which a man happens to find himself during his development, by the structure of the society in which he grows up, by the tradition of that society, and by its appraisal of particular types of behavior.

The music of Mozart is of such purity and beauty that one feels he merely found it - that it has always existed as part of the inner beauty of the universe waiting to be revealed.