I'm unfamiliar with your language, so take this attempt at translation with a grain of salt:

You are small and I am big, this is but a fantasy of the world. For thirst is larger than the vastness of the ocean.

It's likely a metaphor for how any desire (thirst) is infinite (ocean) and cannot be satiated. By trying to resolve your desire it will only grow and increase your suffering.

This further ties into the illusionary nature of worldly matters in the first sentence. For example if you desire say friends, money, knowledge, or anything else, you'll likely have more of that than others, which makes you feel big. However these desires have grown into a prison for you, and that actually makes you smaller than someone who has found liberation from them, who might otherwise appear lonely, poor, or ignorant.