肇論新疏 1.35

1.35

夫欲存（猶取也）無以觀法者，可謂識法實相矣。是謂雖觀有，而無所取相。

Now, one who wishes to retain (meaning seize) non-existence in order to contemplate dharmas can be said to understand the real mark of dharmas; this means that although one contemplates existence, there are no marks seized upon.