Good and evil exist only in terms of the happiness or suffering they create in ourselves and others

Whatever you train, you change your brain.

Anyone can be happy by simply training their brain.

At each point in our lives, we are at a crossroads. We are the fruit of our past and we are the architects of our future... If you want to know your past, look at your present circumstances. If you want to know your future, look at what is in your mind.

[Some of the people I'd met] were wonderful people as human beings, and some people were more difficult. I could not see a correlation between their particular genius in playing chess and music and mathematics, etc. ... with human qualities. Some were really good, wonderful people, and some were difficult characters, but there was no clear correlation. But when I met some spiritual masters, [I thought that] there had to be a correlation, and it turned out to be true.

When hearing a door creak, the optimist thinks it's opening and the pessimist thinks it's closing.

No change occurs if we just let our habitual tendencies and automatic patterns of thought perpetuate and even reinforce themselves, thought after thought, day after day, year after year. But those tendencies and patterns can be challenged.