Hello,
In Buddhism there is truth. The truth is described in 4 parts called the Four Noble Truths.
There is suffering.
There is a cause of suffering.
There is an end suffering.
The way to end suffering is the Eightfold Path.
The last part, the Eightfold Path, is the most practical advice on living a moral, ethical, and examined life that has been devised by the human mind. In my opinion practical advice is scant or missing in most other religions.
I left Catholicism years ago for reasons I have discussed on other threads. Basically I could no longer believe in a God that needed to be worshipped. That just didn’t make sense. After many years I found an ethical and moral system with a transcendent goal that did not involve a God or a third party savior. Buddhists believe that each of us must save ourselves by moral action and by examining our own existence.
One can see similarities between Buddhism and Christianity when one compares Agape to Metta. Both are unreserved loving kindness to all of life. There is much that is different not only from Christianity but from all theistic religions.
What makes Buddhism true for me is the detail of the teachings of the Buddha. As I explore these teachings, I see an immediate impact on my life. As I meditate, I experience a realization of this truth.
In the end each of us feels we have the truth. But in my opinion the truth is like an elephant that is being described by a group of people wearing blindfolds each of whom is describing a different part. The goal of Buddhism is to take off the blindfold.
I hope this is what you were looking for, AngosTheist.