Agents of S.H.I.E.L.D., Season 4

Coulson:
I'd be the first to admit that I followed my worst instincts at times. Last year. Loss will make you do that. Feels good in the moment, but it never ends well. I've lost my temper, I've killed. But lately, I have this voice in my head telling me not to go down that path again. It's telling me to be patient. To stay steady.

Mack:
I take it you don't mean me sir.

Coulson:
It's Agent May. She'd tell me to stay on mission.

Mack:
Listen to the woman, she knows what she's talking about.