Is it I?

Mat 26:22  And they were exceeding sorrowful, and began every one of them to say unto him, Lord, is it I? 

Mar_14:19 And they began to be sorrowful, and to say unto him one by one, Is it I? and another said, Is it I?

How oft do we, when there is a question of responsibility, especially if negative, say is it I?  Or rather do we spend time trying to find out who else might be responsible or to blame?

When something isn't done, or properly, how often do we 'step up' to the plate and accept we may have failed, fallen short, or sinned?

Jesus had just told them:

Mat 26:21  And as they did eat, he said, Verily I say unto you, that one of you shall betray me.

Betray - G3860 - From G3844 and G1325; to surrender, that is, yield up, intrust, transmit.

• G3844 - A primary preposition; properly near, that is, (with genitive case) from beside (literally or figuratively), (with dative case) at (or in) the vicinity of (objectively or subjectively), (with accusative case) to the proximity with (local [especially beyond or opposed to] or causal [on account of]). In compounds it retains the same variety of application.
• G1325 - A prolonged form of a primary verb (which is used as an alternate in most of the tenses); to give (used in a very wide application, properly or by implication, literally or figuratively; greatly modified by the connection).

Mat 26:25  Then Judas, which betrayed him, answered and said, Master, is it I? He said unto him, Thou hast said. 

If we would ask, "Is it I?", either to Jesus or others, how would we handle an affirmative answer?

Judas went onto betray Jesus, then 'repent' which wasn't godly repentance, committed suicide.  If it 'is I' that is part of the problem, or causing an issue, how willing are we to repent and seek forgiveness/reconciliation?