Who exactly is the speaker in the poem, "To the Virgins, to Make Much of Time"?

This poem is an allusion to the parable of the ten virgins in Matthew 25:1-13 (NRSV):

‘Then the kingdom of heaven will be like this. Ten bridesmaids took their lamps and went to meet the bridegroom. Five of them were foolish, and five were wise. When the foolish took their lamps, they took no oil with them; but the wise took flasks of oil with their lamps. As the bridegroom was delayed, all of them became drowsy and slept. But at midnight there was a shout, “Look! Here is the bridegroom! Come out to meet him.” Then all those bridesmaids got up and trimmed their lamps. The foolish said to the wise, “Give us some of your oil, for our lamps are going out.” But the wise replied, “No! there will not be enough for you and for us; you had better go to the dealers and buy some for yourselves.” And while they went to buy it, the bridegroom came, and those who were ready went with him into the wedding banquet; and the door was shut. Later the other bridesmaids came also, saying, “Lord, lord, open to us.” But he replied, “Truly I tell you, I do not know you.” Keep awake therefore, for you know neither the day nor the hour.

The wise virgins filled their lamps with oil and waited for the bridegroom to appear. The foolish virgins put off filling their lamps and fell asleep. When the bridegroom came, they were not ready to go with him. 

I would say that the speaker is the poet himself, telling us to seize life while we can.