The most important condition for lasting happiness is even-mindedness. Remain ever calmly centered in the Self, within. As a child’s sand castle disintegrates before invading waves, so does a restless mind, lacking strength of will and perseverance, succumb to the pounding it receives from the waves of changing circumstance.
A diamond, however, retains its strength and clarity no matter how many waves crash down upon it. The man of inner peace, similarly, his consciousness made crystalline by inner calmness, retains his equanimity through even the storms of mighty trials.
“How to Be Happy All the Time. The Wisdom of Yogananda, Volume 1”, Crystal Clarity Publishers, 2006