Identifying Tone in Speech Excerpt

In the following excerpt from a speech, the speaker addresses a group of students graduating from high school:

"Today, as you stand on the brink of your future, know that the world is a vast ocean of possibilities waiting to be explored. Embrace the challenges ahead with courage and determination. Each wave you face will shape you, but remember, resilience is your greatest ally."

What is the tone of the speaker in this excerpt?