Unshakable

Our conviction is unshakable.

Mary was irritated by Tom's unshakable calmness.

My faith in something spiritually superior is unshakable.

You hold within you an unshakable strength.

His calm is unshakable.

She cherished their unshakable bond.

They believed in their unshakable bond.

She believed in their unshakable bond.

I've always felt like aliens have bestowed a special life mission on me, always thought this and I've always had this unshakable feeling.