"I am here for a purpose and that purpose is to grow into a mountain, not to shrink to a grain of sand. Henceforth will I apply ALL my efforts to become the highest mountain of all and I will strain my potential until it cries for mercy"

In this quote, Og Mandino is emphasizing the value of having a purpose and making every effort towards development rather than choosing mediocrity. He compares himself to a mountain, a symbol of strength and immovability, and reveals his determination to become the "highest mountain," or the very best variation of himself. He also highlights the requirement to push oneself to the limitation in order to attain such success, even if it means experiencing discomfort or discomfort.