Surrender matures into yoga when it discovers the Infinite in the finite. Understanding is enough for the mind to transform. Neither is enough for the body. It needs to act from inside itself . Inner harmony maturing into unity makes for outer benevolence and sweetness .
Prostration is the symbol of physical surrender.
Total respect for every other opinion is mental surrender. True humility is to be aware that one does not know anything. That translates in behaviour as fully respecting another's position whatever it is. Man accomplishes, moved by an emotional ideal or urge which comes from the family, personal success or patriotism. Skill, selfishness, smallness or any other narrow endowment sometimes achieve what the age does not have or is not able to conceive of.