It's become quite popular to use the phrase "my truth". Whether intended or not, its use implies that truth is somehow relative.
But truth is always true.
And how can we find it? By keeping our awareness within the framework of our own 6 senses, namely seeing, hearing, tasting, touching, smelling, and thinking. Every moment we experience the sensations of the body, without mentally adding anything to them, we're experiencing the truth, reality as it is.
The Truth Shall Set You Free
When we're able to keep the mind rooted in what's really happening in the moment, instead of speculating and dwelling within unfounded opinion, we free ourselves from the process of creating suffering that would have otherwise arisen.
For example, it's common, when listening to or reading another's words, that we begin to think something along the lines of "I know what you're really saying" or "what you really mean." These of course we call projections. They're formed through rushing hastily into unfounded opinion, their accuracy skewed by the bias of our own perceptions.
So rather than allowing the mind to carry us into these rash, far reaching conclusions, we instead turn our awareness inward to watch the process and see for ourselves where these processes lead. We can ask one simple question..."do I know this to be true?" When we're being honest with ourselves, most often the answer is "no."
Meditators are like scientists working in the laboratory of the mind, the experiment being the observation of different tendencies and where they lead. The more familiar we become with these tendencies, the better we can circumnavigate the suffering that would otherwise arise through their entertainment.
In other words, over time, instead of holding onto opinions that give rise to pain, we first learn how to let them go, then learn how not to form them in the first place.
We learn to abide in truth, and truth sets us free.