John Gill Commentary Mark 4:13

"And he saith unto them, Know ye not this parable? and how shall ye know all the parables?" — Mark 4:13 (ASV)

And he says unto them, know you not this parable ?
&c.] So easy to be understood, taken from things common, and which fall under every one's observation:

and how then will you know all parables ?
if not this single one, and which is so plain, how will you be able to understand the numerous parables hereafter to be related, and which will be much more difficult?