How can we lead a holy life?
"Keep the Commandments", replies Jesus (Mt 19: 17)
Especially keep the Commandment of love of God and neighbors (Mt 22: 36 sq.).
Imitate Jesus. He is the only perfect model of holiness.
Be open to the sanctifying Spirit. Without Him, no holiness is possible.
Pray to Mary. She will show you a surer and easier way to Jesus, source of all life and holiness.
Do all this in union with the Church, the Body of Christ (Ep 1: 22-23).