If I Could Tell You by W.H. Auden

I like very much the format of this poem than the content. The first stanza has two recurring lines. In the following three stanzas, the last line in each alternates between the two in the first stanza. Finally, the last two lines of the poem are the two recurring ones. This was probably confusing so I'll just copy and paste it here:
Time will say nothing but I told you so,
Time only knows the price we have to pay;
If I could tell you I would let you know.

If we should weep when clowns put on their show,
If we should stumble when musicians play,
Time will say nothing but I told you so.

There are no fortunes to be told, although,
Because I love you more than I can say,
If I could tell you I would let you know.

The winds must come from somewhere when they blow,
There must be reasons why the leaves decay;
Time will say nothing but I told you so.

Perhaps the roses really want to grow,
The vision seriously intends to stay;
If I could tell you I would let you know.

Suppose all the lions get up and go,
And all the brooks and soldiers run away;
Will Time say nothing but I told you so?
If I could tell you I would let you know.