Reality Vs Theory

I came across this write up and it rang so true, but almost impossible. In theory, we sprout sayings and relationship "do's" and "don'ts"
and how it's weak willed people who can't follow these simple rules.

In reality, it's hard as hell to practice. Sometimes the heart wants what the heart wants, and telling yourself not to want him or her, is tantamount to telling the Earth not to rotate or revolve. Believe me, I've been there.

However, there comes a time when your head says to your heart "enough is enough ", then and only then can you heed the last line.

I need an Amen.