According to Buddhism, is there truth that a self can hold?
No. The separate self is an illusion and can not truly know anything. Only I am is known.
Do Buddhists hold this to be true?
Meditation is not necessarily Buddhist.
Search this source of emotion and thought. Who is it that experiences it. The answer can not come from the mind since what you perceive can not be you. This is self enquiry and can lead to revelations.