The orange

The orange has three parts; the skin, the meat, the seed. All three make up the orange, all three serve a purpose, while at the same time each part is distinct. The skin protects the meat and the seed from the outside world, and gives the orange it's classic orange globe shape. The meat surrounds the seed and nourishes us, and is what most people think of when they think of tasting an orange. The seed, when stuck in the ground, dies and produces an orange tree.

So it is with the Trinity. God the Father, God the Son, God the Holy Spirit.

Psalms 34:8

O taste and see that the LORD is good: blessed is the man that trusteth in him.