It does not really matter whether it's Christian or not, although I would admit that each soul will see the Light of Love in a different way.
The basic tenets of the spiritual life are in every religion: Love, mercy, compassion, prayer, silent prayer, meditation, self-giving ....
You stay strong by Love, Devotion and Surrender. Devotion is the one-pointed submission to the Will Divine and Surrender is our Conscious oneness with God's Will. Love is the first stage. Feel like the child does for its mom.
Human capacity has to go. (The ego-self) Prayer begins when human capacity ends. We need to feel that what we have is only 'limited freedom', that God is in charge, not us.
Spiritual practice requires self-giving, prayer, Love, soulfulness and integrity, gratitude, meditation ... these widen the psychic Heart and will prepare us for the descent of the Higher forces (Grace) raining down. Without the power and transmission of Grace, little can be done and for this one requires a receptive vehicle.
Self-control, diet, right or wholesome lifestyle is of paramount importance. Avoid the ones that are always complaining and always have something bad to say about this world. Be like a child but not childish, serve, identify with humans, offer yourself to the God in humanity, practice self-control ...
Have faith in Jesus. In the same way, I would encourage the Buddhist to have Faith in Buddha. Faith, sincerity of purpose, purity of intention, one-pointedness and a discliplined lifestyle are excellent keys.
Finally, one would and does fail or stumble numerous times in the spiritual life. Be practical. Do not pretend to be what you are not. Avoid false modesty. Ceaseless prayer - a 24 hr a day life of prayer and loving service - at home, on buses, on trains, in the streets and at work are essential. Remain watchful. Prudence and wisdom are excellent keys to open the door of the Divine. God speed!!