This. It's the natural progression of anything in this universe. Even people. Your rate of physical growth between the ages of 2 and 22 was enormous. Your rat

This. It's the natural progression of anything in this universe. Even people. Your rate of physical growth between the ages of 2 and 22 was enormous. Your rate of physical growth between the ages of 22 and 42 was likely minimal. (Unless you grew, um, laterally.) A 22 year old should not be comparing himself to a 2 year old and lamenting that he can't match the 2 year old's growth rate.