There's truth in that and the quality of our beliefs are affected by how honest we remain to objectivity.
I am not saying that there are no truth to subjective thinking, George, only that when you say
“I believe in”, this is “subjective”...like what I highlighted below in bold...it’s not “objective”:
What makes you think personal beliefs or preconceptions influenced my decision? That might be your preconceptions about me. Actually I was a materialist-atheist at the start of this thinking how could anything not physical be real. Well I now believe in planes of reality not directly detectable by the physical senses or instruments.
And the bold part, where you “...not directly detectable by the physical senses”, is only partially true. Your “physical senses” can be either objective or subjective, and that’s dependent upon if you have something independent that verify what you see, hear, feel or smell, like the “or instruments”.
Objective is all about verification.
If you have something independent that can verify what you have observed or heard or felt, than your physical senses of that phenomena can be considered “objective”.
Let’s say this morning, you get out of bed, and it is cold, and estimate temperature to between 6 to 8 degrees Celsius, from your other experiences in the morning. That guess is subjective.
But if look at the thermometer in your room or check your phone apps that give local temperature of where you lived, and it say 7.6 degrees C, then and only then your guess is considered objective.
Like I said, how you think, can be objective or subjective, but objectivity come verification from other sources other just your personal opinion.
I am not denying that subjective thinking or believing can be true. It can be. But if you want facts, then there have to evidence to support whatever you believe. Evidence can provide the levels of objectivity to what you think about or what you believe in.