In each stanza, the first line rhymes with the sixth line. Similarly, the second line rhymes with the fifth line and the third line rhymes with the fourth line. Thus, each verse shows an interesting musicality between the six lines.
The main idea of the poem is a person's desire to reach the heart of the person they love, that is, the poem talks about unrequited love, but the speaker wishes to reach the heart of the person he loves, making it to love you too.
In the first stanza we are introduced to a speaker who can withstand anything between him and his beloved, who has curls of fire. He can endure everything patiently, neither time nor space are able to make him give up.
In the first stanza we are introduced to a speaker who can withstand anything between him and his beloved, who has curls of fire. In addition, he describes what his beloved looks like when he says that small waves look like "ringlets of fire", he probably uses this to talk about the hair of his beloved, who must have red curls.
In the last line of the poem, we can see that the speaker believes that if time and space cannot separate him from his beloved, it means that time and space do not exist, as long as there is enough love between him and his beloved.