Forgiveness usually ends a quarrel, but Yuhanna's seven lines begin after it. The speaker and another person have failed together ("our failure"), and the other has already pardoned the speaker. What is left is the awkward business of answering someone who has understood you better than you managed to explain yourself. The poem's answer is to stop explaining and send a flower.
The opening couplet gives the pardon a startling weight. "Saving the guilty from the grave" turns forgiveness into a rescue, as if the speaker had been pulled out of something fatal. The archaic "thou forgave" adds solemnity, even a hint of prayer, though the verb form doesn't quite match the old-fashioned pronoun, so the line sits between formal and plain. By line five the speaker has switched to "you." Judging by the text, that shift marks a move from awe to closeness: the forgiver stops being a figure to be revered and becomes someone who understands.
The poem's sound pattern loosens as it goes. The first couplet rhymes cleanly, "forgave" with "grave." The second settles for an echo, "shortcomings" and "bindings," which share only their ending. The third is looser still, since "faults" and "tumults" meet only in a final sound. Then the last line has no partner at all. The line lengths follow the same drift: roughly eight syllables, then ten, then eight, then seven and seven, before the final line stretches to about thirteen. Having lost its neat pairing, the poem ends in one long, slightly breathless sentence, as if feeling has outrun the form.
The body is the poem's quiet map. First comes the mouth: "My mouth bound by honest bindings." The repeated "bound" and "bindings" tie the line in a knot, and the phrase is a small paradox. Honesty is usually freeing, but here it is a restraint. The speaker can give "reasons and shortcomings" but not excuses, so the truth keeps the mouth shut. Then comes the hand, with its "tumults," a vivid word for an action that was restless and out of control. The poem never says what the hand did, and that privacy is part of its tact. Finally comes the heart, which arrives last in the final line. The sequence runs from the part that talks, to the part that did the harm, to the part that feels. One could add that the hand which caused the tumult is presumably the hand that sends the flower, though the poem leaves that for the reader to notice.
The hydrangea carries the poem's whole emotional weight. The speaker doesn't say what quality of the heart it stands for, so it is worth thinking about what a hydrangea is. It is a round cluster made of many small blossoms. Its colour changes with the soil it grows in, and it droops dramatically when dry and recovers when watered. Any of these could fit a heart that is full, changeable, and in need of care after a failure. The poem doesn't choose among them, and that openness is a strength, because the gift can mean more than a stated comparison would.
The syntax of the last line also rewards attention. Instead of "my heart is like the hydrangea," the speaker begins with the simile, "Like the hydrangea I have sent you," and holds back the subject until the very end: "is my heart now." The flower comes first, as an object in the hand, and the heart follows it. The final word, "now," separates this moment from the failure and the explanations in the past tense. The verbs march through "forgave," "explained," "understood," "forgave," and only in the last line does the poem arrive in the present.
The title, "Understanding the Heart," works in two directions. In the middle of the poem, understanding is what the forgiver has already done with the speaker's faults. By the end, it is a task handed to the reader and to the recipient: to read a heart in a flower.
The poem is slight in size, but it has something to teach. It shows that an apology or a thank-you can be more convincing when it admits the limits of speech, and it lets an image do what the "bound" mouth cannot. Its restraint, with no excuses, no description of the offence, and one well-chosen object, is what makes the feeling believable.