The thing I wonder is where is God, I am a believer that if there is God then its within me, otherwise he is not there. Why do one needs to follow such practices when all one needs to do is try to be pure and in service to human beings in need, is that not sufficient. Or getting pure is so difficult that unless you go through the cleansing process, you can't be clean😕
Generally we start off by wanting material goods in order to satisfy our worldly desires; after a while we may get tired of it and want something more meaningful and lasting. Yes certain spiritual paths, practices etc are recommended and often after fumbling and learning along the way we get a better insight into things and understand the relationship between Man, God and the universe. Logical sequence has been us intitially gaining Self Satisfacton which then leads to Self Sacrifice and then Self Realisation. Pantajali's eightfold yoga path gives a broad definition but it is meant for persons who has reached a certain level understanding because it starts off by saying that we should have the quality of goodness and also contol our senses; basically to achieve concentration and meditation we need to purify our minds so that there are no distractions.Reading of some good books is also very useful, especially the lives of saints, sages and teachers. After a while even reading of too much such books are discouraged as it may remain only book knowledge, so application of the lessons learnt in our daily lives is recommended.As to predefined set of beliefs I would say that there are no hard and fast rules. But we should not bend the rules for our own selfish purposes of taking advantage of others.