Occasionally when I'm praying I feel this great pressure in my breast, this great love, and even tear up. It can be overwhelming and even a little frightening, but at the same time it feels like a fraction of what awaits and all this flesh could handle. It can be too much but I miss it when I don't feel it.
(And yes, I've felt it praying to the Lord but also when asking Mary to pray for me, the Sacred Heart and the Immaculate Heart)