A Mouth Without A Heart?

I chant the Buddha’s name and memorised the sutras.

My mouth is chanting but my heart is not chanting?

Or is it that my mouth is chanting, my heart is also chanting.

Is it that I am familiar with it, and hence my mouth will just go through the sutra once,

or is it that in my heart, I am bowing, paying respect and experiencing what was said in the content of the sutra?

有口无心？

我念佛，背经典。

是口念，心不念?

还是口念，心也念？

还是熟悉了，嘴巴一“溜“ 就把经典背过一遍？

还是在心绪里再再地礼敬，思惟和体会经典的内涵？