This talk at Brahmanaspati Kshetram looks at the sacrifices Sri Aurobindo and the Mother have made for the redemption of earth and mankind. A follow-up question: Self-control and suppression in context of Sacrifice.
It is the fact that people who are grateful and cheerful and ready to go step by step,... do actually march faster and more surely than those who are impatient and in haste and at each step despair.