One of the most important lessons Yoga teaches us is that we must learn to let go of any attachment to the outcome of our actions. If we act with full focus and integrity, and if we act with care and compassion in our hearts, we need not take pride or suffer disappointment from the results. We can still learn from our mistakes, but we need not rely on the outcome to be at peace, to keep our equanimity.

Perhaps the most powerful way we can learn to embrace this practice is from our own experience—the joy we derive from giving ourselves whole-heartedly in service to someone or some higher purpose. Many people who work in service of others find tremendous fulfillment in the act of serving, giving, or even praying for others.
-Swami Ramananda