The only permanent truth that can be found that is the truth is ephemeral and slightly beyond our grasp to perceive. It is true but we only receive a glimmer of it. It can't be proven or grasped, just sensed.
All other 'truths' are like changing sands or waves on the ocean. They are constantly shifting and changing, seemingly true for this instant but different for the next. To seek the truth in this existence is expecting too much. I have learned this the hard way. The truth of this situation or that situation will always have an equal opposite that also holds some truth. And it will shift and change gears. Any hard effort to capture and preserve it won't last.
This is not to say in this life some things are more workable for a time. These things closely reflect how the natural world works and can be beneficial to follow. Some systems of thought and procedures do parallel the reality of life and can work in life. But even these 'truths' are temporary. They might have wisdom and craft and tradition and principle and time to back their case, but they still are not whole and will disappoint if held on too tightly or too long.
This is why there is less and less to say in life. One begins to see the cracks and flaws in what one believes. One also sees the validity of alternate views that also make sense. And the only consistent truth that can be held onto to is in another realm always slightly beyond our reach.
All this can be learned from a life that seems to work or a life that doesn’t seem to work. Either way it is the truth.