have confidence without basis

There are several things to be said often from my respectors.

One of them is "to have unfounded confidence".

Even if I overslept and seems to be late, I have confidence without grounds.

Even though I should have a nap for a while, when I fall asleep for about 4 hours, I have confidence without foundation.

Even though I tweeted, there was no response at all, I have confidence without basis.

Any time, "have confidence without basis"!