There are divine traditions — the magisterial teachings of the Church and the Bible. These divine traditions are the truth (see 2 Thes 2:15). They cannot be changed. We must conform our lives to these divine traditions. On Judgment Day, we will be judged according to these divine traditions.
There are also human traditions. These are often very helpful to people. However, sometimes a human tradition becomes a diabolical stronghold (see 2 Cor 10:4). Good human traditions are to be respected but should never be placed above divine traditions. Bad human traditions must be overthrown by the power of the Holy Spirit.
How can we tell if a tradition is divine or human? Although this is usually obvious, sometimes it is a matter of interpretation. The Church, which alone is "the pillar and bulwark of truth" (1 Tm 3:15), is the only body which can authoritatively tell us what is divine or human tradition.
How can we tell if a human tradition is good or bad? Although we will probably know this by the fruit of the tradition (see Lk 6:44), this may take too long or again be a matter of interpretation. Once again, we need the Church. Otherwise, we will probably make tragic mistakes, even if we are sincere.
Thank God for revealing Himself to us and loving us through traditions. Thank God for the Church and the grace to submit to the Church's authority.