Why not?

Why is it that we can come up with a thousand reasons not to do something that we actually desire to do?

It probably won't go very well.

I don't have enough time.

I'm not any good at that anyway.

It seems too hard.

There's no need for my perspective on that.

I don't want to fail in front of everybody.

I don't know how.

It's too expensive.
I'm too tired.

I don't want to go alone.

I am afraid of heights.

It's too scary.

I might get hurt.

They don't need me.

I don't bring anything worthwhile to the table.

It's much easier to not do anything at all.

I'm too old.

I'm too young.

I missed my opportunity.

It might not live up to my expectations.

I might not live up to their expectations.