Ye know not what ye ask. — The words come to us as spoken in a tone of infinite tenderness and sadness. That nearness to Him in His glory could be obtained only by an equal nearness in suffering. Had they counted the cost of that nearness?
To drink of the cup that I shall drink of. — The words that follow, “to be baptised with the baptism that I am baptised with,” are not found in many of the best MSS., and have probably been added to bring St. Matthew’s narrative into harmony with St. Mark’s. For the sake of completeness, however, they will be examined here. And (1) we have the question, How did the two disciples understand our Lord’s words? We are familiar with their meaning. Was it equally clear to them? As far as the cup is concerned, there can be little doubt that any reader of the Old Testament would at once recognise it as the symbol of a good or evil fortune. There was the “cup running over” of Psalms 23:5, the “wine-cup of fury” of Jeremiah 25:15, the “cup of astonishment and desolation” of Ezekiel 23:33. The meaning of the “baptism” was, perhaps, less obvious (see Note on Matthew 20:29, on our Lord’s use of the symbolism), yet here also there were the overwhelming “proud waters” of Psalms 124:5, the “waves and billows” of Psalms 42:7. The very verb, “to baptize” (i.e., to plunge into the deep), was used by Josephus for the destruction of a city (Wars, iv. 3, § 3), by the LXX. for “terrifying” in Isaiah 21:4. Our Lord Himself had already used it in dim mysterious reference to His coming passion (Luke 12:50, where see Note). There was enough, then, to lead them to see in their Master’s words an intimation of some great suffering about to fall on Him, and this is, indeed, implied in the very form of their answer. “We are able,” they say, in the tone of those who have been challenged and accept the challenge. That their insight into the great mystery of the passion went but a little way as compared with their Master’s, lies, of course, in the very nature of the case. When the beloved disciple, in after years, taught by his own experience and by his brother’s death (Acts 12:2), thought over the words, “Let this cup pass from Me” (26:39), he must have seen somewhat more clearly into its depth of meaning.