la serenidad de aceptar las cosas que no puedo cambiar;
valor para cambiar las cosas que puedo;
y sabiduría para conocer la diferencia.
The natural man is lazy, always tends to take the line of least resistance, and so, in this as in lesser matters, he does not get down to bedrock principles until he is compelled to.
There is only one way under the sun by which man can attain harmony, that is to say, health, prosperity, peace of mind – salvation, in the true sense of the word – and that is by bringing about a radical and permanent change for the better in his own consciousness.
Indeed, the changing of one's consciousness is in truth the only thing that is worth doing at all.
Emmet Fox: The Sermon of the Mount