Not sure..

The feeling of "not sure" can be unavoidable...

The feeling of "not sure" can be unbearable..

The feeling of "not sure" can be unpredictable..

The feeling of "not sure" can be unpreventable..

The feeling of "not sure" can be unshakable...

Why, there is a feeling of "not sure"?

Lord, have mercy on me..

Jiayou, dear..