If you let them control you, they will destroy you.
If you seek God’s help in managing them, they can become allies.
He that trusteth in his own heart is a fool: but whoso walketh wisely, he shall be delivered. Pro 28:26
Anger can be especially damaging. Pro 14:29
If you begin to experience any strong emotion, stop immediately to ask God to guide you in handling your emotion His way. Neh 2:2-4
You may find this Emotional Intelligence book summary helpful.