Final answer:
The last five lines of the poem suggest that even though individuals may be weakened by time and fate, their strong will allows them to continue striving and seeking in life.
Step-by-step explanation:
The last five lines of the excerpt from Lord Alfred Tennyson's poem suggest the theme that even though time and fate may weaken individuals, their strong will and determination allow them to continue striving, seeking, and finding in life. Despite not being as strong as they once were, individuals with heroic hearts can still persevere and not give up.