Reddit mentions of Jesus in the Lotus: The Mystical Doorway Between Christianity and Yogic Spirituality

You don't hear about it much in evangelical circles, but Christianity has always had a meditative/contemplative stream, which has a surprising number of parallels with Buddhist thought and practice.

I'm a huge fan of the work of Richard Rohr at the Center for Action and Contemplation.

You might also find the writings of Thomas Merton interesting - he saw a lot of parallels between the Christian monastic tradition and the Zen Buddhist one.

My yoga teacher also strongly recommends Jesus in the Lotus - I haven't read it yet, but I've been quite startled over the last year at how beneficial the yoga tradition has been to my Christian faith.

I know none of this answers your original question - these conflicts are really, really tough. Parents want the best for their children, and it's achingly hard for them when they see their kids follow a path that they've been told to be afraid of. (For what it's worth; I applaud you. I have a huge degree of respect for anyone who can integrate a daily meditative/contemplative practice into their life.)

I can't tell you what to say to your mother, but I have found that there is tremendous power in simply listening and seeing someone else's pain and fears. It's possible, though certainly not easy, to remain grounded in your own path and identity at the same time as seeing and understanding the worry that your mother is experiencing.

Check out Jesus in the Lotus: The Mystical Doorway Between Christianity and Yogic Spirituality