The very nature and character of God is fierce yet gentle. His Word recounts that balance from the beginning of time. Jesus lived out that balance. Holy Spirit helps us do the same.
You can do this. Stay focused on holiness and balancing life. Stand firm and fierce in your beliefs and faith while maintaining gentleness in your soul and harmlessness to others.
Behold, I send you forth as sheep in the midst of wolves: be, therefore wise as serpents, and harmless as doves. Matthew 10:16