The tone of a poem is the author's attitude towards the subject matter or the audience. In this case, the tone towards the end of the poem is cheerful. Let's break down the reasons why:

1. Optimism: Throughout the poem, the speaker is struggling with feelings of despair and loneliness. However, towards the end, the tone shifts to one of optimism. The speaker says, "And I am glad to learn that life / In all its trimmings, still goes on." This shows that despite the difficulties, the speaker is choosing to focus on the positive.

2. Acceptance: The speaker acknowledges that life is not perfect, but still finds reasons to be happy. This is evident in the line, "The stars shine bright, the moon still glows / And there is joy in every dawn." This shows that the speaker has come to terms with the fact that life has its ups and downs, but is choosing to focus on the good.

3. Gratitude: The final lines of the poem express gratitude for the simple pleasures in life. The speaker says, "And I am grateful for the chance / To see the beauty of it all." This shows that the speaker has a sense of appreciation for life, despite its imperfections.

In conclusion, the tone towards the end of the poem is cheerful because the speaker is choosing to focus on the positive aspects of life and express gratitude for them.