It was felt before it could be argued
Two things hold at once here: you are certain about something fairly fundamental, and you cannot construct the argument for it. Saturn in Pisces in the 9th house means conviction arrives by a route that does not produce evidence, and then requires you to defend it anyway.
The 9th house asks for a framework you can stand on; Pisces knows things without being able to show its working. Saturn insists on accountability. So you hold a genuine position, arrived at through experience rather than reasoning, and every attempt to justify it makes it sound considerably weaker than it is.
It comes due when you have to justify it out loud
The test is somebody intelligent asking you to make the case, sincerely, without hostility. The argument you produce will be worse than the conviction. Saying that plainly — that this came from experience and the account of it is inadequate — is more honest and more persuasive than an argument you do not actually believe is the reason.
They think you are being vague
Because you cannot supply the reasoning, people conclude that there is not any, and a position arrived at through years of observation gets filed alongside things somebody read once. That misreading is frustrating and it is a fair inference from what you have been able to show. The evidence exists as experience and does not travel.
The weight is holding something you cannot demonstrate
Living by a conviction you are unable to prove is a particular strain: you cannot recruit anybody to it, you cannot check it against another person's version, and in a bad week you cannot verify it yourself. That is a solitary position to be in, and it is why the doubt when it comes is unusually destabilising.
A faith that has survived being examined
What this builds, over decades, is something unusual: a set of convictions that came in through experience, have been questioned repeatedly and honestly, and are still standing. That is neither credulity nor scepticism. It is the rarer third thing, and it is worth writing down while you can still trace where any of it came from.
You are good at work with an unmeasurable component
Fields where the important part cannot be quantified — the pastoral element, the judgment call, the sense of what a situation needs — are where you are genuinely strong and where your contribution never appears in any assessment. Choose organisations that recognise the unmeasurable half, because those that do not will rate you as merely adequate for a whole career.
You have found people who understand it
Somewhere there are one or two people who hold something similar and with whom you do not have to translate. Those relationships are disproportionately important to you and are usually not the ones you see most. The contact is worth maintaining actively, since it is the only setting in which the most significant part of you is ordinary.
A partner who dismisses it will not survive
You can be with somebody who does not share what you believe and not with somebody who finds it faintly ridiculous, and the second is difficult to detect early because people are polite about it. Watching for how they handle it in company, rather than alone with you, is the more accurate test.
You went somewhere your family could not follow
Whatever you came to believe took you away from the household's account of things, and the departure was internal rather than announced, so nobody quite registered it happening. There is a version of you at family gatherings that has been out of date for twenty years. Nothing obliges you to update it and it is worth knowing that it stands.
The practice is the part that works
Whatever framework you hold, the benefit comes from the regular practice rather than from the belief: the sitting, the walking, the observance kept up week after week. Periods without it are visibly worse and you tend to attribute that to circumstances. The practice is doing more of the work than the philosophy is, which is not a criticism of the philosophy.