There was the Door to which I found no Key;
There was the Veil through which I might not see:
Some little talk awhile of Me and Thee
There was—and then no more of Thee and Me.

The main inspiration of this quatrain is found in C. 387.

Neither thou nor I know the secret of Eternity,
And neither thou nor I can de-cypher this riddle;
There is a talk behind the Curtain[48] of me and thee
But when the Curtain falls neither thou nor I are there.

Ref.: C. 387, L. 581, B. 574, P. 33, B. ii. 421, T. 260.—W. 389, V. 628.

We also see in the quatrain the influence of O. 29 and C. 193, ll. 1 and 2.

No one can pass behind the Curtain (that veils) the secret,
The mind of no one is cognizant of what is there:[49]

Ref.: O. 29, C. 56, L. 61, B. 58, S.P. 43, P. 63, B. ii. 103, P. v. 188.—W. 47, N. 44, V. 60.

No one can pass behind the Curtain of Fate
No one is master of the Secret of Destiny.

Ref.: C. 193, L. 345, B. 341, S.P. 177, B. ii. 212.—W 192, N. 177, V. 346.