这种理论太高深了，我现在还不能得其堂奥。

The theory is very profound. I have never fully grasped it.

没有丰富的中文修养难以深窥中国画的堂奥，从而探骊得珠。

Without rich knowledge for Chinese literature, one cannot understant the truth of traditional Chinese painting.

不过，我们在看到这一进路积极意义的同时，还需要明确，其在对进人易学堂奥方面存在一定的不足。

In addition, we need to find out that there are defects in its approach when studying the positive meaning.