What is your take on this Shakespeare quote?

Question

Who could refrain, That had a heart to love, and in that heart, Courage to make's love known?

Macbeth.

Answer 1

If you have the courage of your convictions, then who could not tell of the love that is in your heart?

Answer 2

Not over the top, but more earnest and heartfelt, he is delving deep within himself for these emotions

Answer 3

Does this help?

refrain  - stop oneself from doing something : she refrained from comment.

ORIGIN Middle English (in the sense [restrain (a thought or feeling)] ): from Old French refrener, from Latin refrenare, from re- (expressing intensive force) + frenum ‘bridle.’

So....it's been awhile since I read MacBeth, so I don't recall the context.   But I interpret it as

If a person is in love, and has the courage to make it known...how can they not?