There are techniques of Buddhism, such as meditation, that anyone can adopt. And, of course, there are Christian monks and nuns who already use Buddhist methods in order to develop their devotion, compassion, and ability to forgive.
I myself feel, and also tell other Buddhists that the question of Nirvana will come later.
There is not much hurry.
If in day to day life you lead a good life, honesty, with love,
with compassion, with less selfishness,
then automatically it will lead to Nirvana.
By three things the wise person may be known. What three? He sees a shortcoming as it is. When he sees it, he tries to correct it. And when another acknowledges a shortcoming, the wise one forgives it as he should.
Within the framework of the Buddhist Path, reflecting on suffering has tremendous importance because -realizing the nature of suffering, you will develop greater resolve to put an end to the causes of suffering and the unwholesome deeds which lead to suffering. And it will increase your enthusiasm for engaging in the wholesome actions and deeds which lead to happiness and joy.
Believe nothing, O monks, just because you have been told it, or it is commonly believed, or because it is traditional or because you yourselves have imagined it. Do not believe what your teacher tells you merely out of respect for the teacher. But whatsoever, after due examination and analysis, you find to be conducive to the good, the benefit, the welfare of all beings - that doctrine believe and cling to and take as your guide.
Those... who find delight in freedom from attachment in the renunciation of clinging, free from the inflow of thoughts, they are like shining lights, having reached final liberation in the world.
Your worst enemy cannot harm you as much as your own unguarded thoughts. Develop the mind of equilibrium. You will always be getting praise and blame, but do not let either affect the poise of the mind: follow the calmness, the absence of pride.
A brahmin once asked The Blessed One: "Are you a God?" "No, brahmin" said The Blessed One. "Are you a saint?" "No, brahmin" said The Blessed One. "Are you a magician?" "No, brahmin" said The Blessed One. "What are you then?" "I am awake."
The Tempter masters the lazy and irresolute man who dwells on the attractive side of things, ungoverned in his senses, and unrestrained in his food, like the wind overcomes a rotten tree. But the Tempter cannot master a man who dwells on the distasteful side of things, self-controlled in his senses, moderate in eating, resolute and full of faith, like the wind cannot move a mountain crag.