Buddhist perspective
This is my perspective as a Buddhist. You should bear in mind, however, that different Buddhists will have varying answers.
I believe that any tradition that teaches the importance of morality in general, and in particular the virtues of compassion, loving-kindness, and wisdom is a "legitimate" tradition. Any action that has greed, hatred, or delusion as its motivation is bound to have a bad result no matter how someone may justify it by their understanding of scripture, be it Buddhist or otherwise. Any action that has both compassion AND wisdom as a motivation is bound to have a positive result no matter if the person is a Buddhist or not.
I think the true measure of a person, regardless of their religion, is their actions. What does this person DO? Do they help the needy? Are they full of love? Do they work to understand others, or do they tear others down? Do they put themselves first, or do they work for the good of all?
I think that worshipping Jesus Christ is a legitimate and completely justified practice. Jesus, was after all, one of the best examples of an ethical human being that we have a historical record of. But I think it's even more important to cultivate the qualities of Christ within oneself. The point is to become the best person you can possibly be.
One practice that helps me to be a better person is meditation. In Samatha or Buddhist relaxation meditation, a person sits in a comfortable position and pays attention to their breathing. The mind will wander, but that's okay, don't get angry with yourself over it, just gently guide your mind back. The effect of this is that the mind gradually becomes calmer and less stressed. A stressed-out person is more irritable and more likely to lash out and say things they will later regret. A calm person is more patient and has more emotional energy to lend to others.
In Vipassana, or Buddhist insight meditation, a person lets their mind do whatever, but they pay attention to it with a sensitive objectivity and don't get carried away by it. If the mind loses focus, the meditator brings focus to the breath and then resumes the meditation. The effect of this is that one learns a lot about how the mind works, what the mind spends time thinking about, etc. By learning about your own mind, it helps you to learn about others' minds as well. You begin to realize that we are all in this together. We all want happiness. No one wants to suffer. These things can motivate you to want to help others.
As you might notice, there is nothing in the Bible that forbids these practices. There is nothing magical about meditation, it is a very basic activity that doesn't require that you have any particular belief system. In fact, you could do a different type of relaxation meditation where you focus on Jesus instead of the breath. That could be an excellent meditation for Christians.
This is not a direct quote, but when Mother Theresa was in an interview, she was asked what she said to God when she prayed. She responded that she didn't say anything to God, she just listened. Then she was asked what God said to her. She said that God didn't say anything to her, He just listened. When questioned further she refused to explain. In my opinion, Mother Theresa was practicing a form of God-centered Vipassana meditation.
I realize that this is not a Catholic forum, and I am obviously not Catholic myself, but nevertheless Mother Theresa's words sound like wisdom to me.