Motivation vs Discipline

People seem to use these two words interchangeably. We know that motivation and discipline hold the keys to achieving something we want, but is there a difference between the two? Absolutely.

Let us get the actual definitions clear so we know what we are talking about.

Discipline: (verb) train oneself to do something controlled and habitual.

Motivation: (noun) a reason for acting or behaving in a particular way, or the desire or willingness to do something; enthusiasm.