Holiness is neither piety or religiosity. Just Christ as you.
Things such as days and times or ‘correct’ places of worship cannot impart spiritual life. Only God does this and not God as a generality or as a body of law – but God personally as the Spirit who lives in you and becomes you.
Know that God is God when you are still and when you are not..
‘In him was life, and that life was the light of all mankind’ John 1.4 NIV. The mystery of Godliness in Christ is that in Him you too become life and light. He imparts Himself to you and you become YOURSELF as a son/daughter.
Know Yourself as you actually are.
There are many religious ways of living as a false self. Someone has written, ‘Our True Self remains untouched for most of us, because any direct experience of God or explicit union with God was blocked, denied, and largely declared impossible. It always had to be mediated by a Bible, priest, minister, church, or sacrament, and very often the mediators, and the defending of their mediations, became the primary message itself.’