It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change.
Change is necessary in life to keep us moving, to keep us growing, to keep us interested. Imagine life without change. It would be static, boring, and dull.
Change is hard because people overestimate the value of what they have and underestimate the value of what they may gain by giving that up.
There is nothing more difficult to take in hand, more perilous to conduct, or more uncertain in its success than to take the lead in the introduction of a new order of things.
Change does not roll in on the wheels of inevitability, but comes through continuous struggle.