What is the difference in eating and drinking in John 6:53 and 6:54?

The instruction to drink the blood of the Son of Man is first given in John 6:53: εἶπεν οὖν αὐτοῖς ὁ Ἰησοῦς· ἀμὴν ἀμὴν λέγω ὑμῖν, ἐὰν μὴ φάγητε τὴν σάρκα τοῦ υἱοῦ τοῦ ἀνθρώπου καὶ πίητε αὐτοῦ τὸ αἷμα, οὐκ ἔχετε ζωὴν ἐν ἑαυτοῖς [NA 28] Mo...