Certainty strengthens determination, which in turn strengthens certainty of the truth.

Holding a thought for a sustained period of time
Letting that thought change you and your surrounding
Make sure that the thought you choose to hold in your head should be TRUE.

I mean it should have been proven to be repeatable and verifiable
The only thing you are trying to do is to implement the thought in your life


Determination - Hold a truth ( you have verified on a smaller scale) in your head and let it be manifested in the real world
if you will be certain about the truth, you will be fearless

From time to time, keep testing the truth( as it is the core pillar which will give you strength to march ahead, even when the times will be tough)

Do not believe anything until you have proof for it.
Especially, do not believe without data because you are going to base your entire life on it.

It better be right and truth.

Once you have spent enough time proving something, you will have gathered enough data to give you decision making power.

If you are in doubt, do not take the decision. You do not need to be part of every party.

Certainty strengthens determination, which in turn strengthens certainty of the truth.