What was from the beginning,
what we have heard,
what we have seen with our eyes,
what we looked upon
and touched with our hands
concerns the Word of life—
for the life was made visible;
we have seen it and testify to it
and proclaim to you the eternal life
that was with the Father and was made visible to us—
what we have seen and heard
we proclaim now to you,
so that you too may have fellowship with us;
for our fellowship is with the Father
and with his Son, Jesus Christ.
We are writing this so that our joy may be complete.
(1 John 1:1-4)
1:1 the beginning: I.e., when the Christian message first reached the original readers (2:7, 24; 3:11). There is also an allusion to “the beginning” mentioned in Jn 1:1, where the reference points back to the dawn of creation, when God brought all things into being through his divine Son (1 Jn 2:13–14; 3:8). the word of life: The good news of the gospel. Its focus is the personal “Word” of the Father, Jesus Christ (Jn 1:1; Rev 19:13). See word study: Word at Jn 1:1.
1:2 with the Father: Christ embodies the eternal life (5:11) that he shares with the Father in his divinity (Jn 5:26). This means that Christ himself is “true God” (1 Jn 5:20; Jn 1:1) and that he reveals to us the mystery of God’s inner life as a Trinity (Jn 1:18).
1:3 fellowship: The interpersonal communion that believers have with God and with one another (1:6–7). It is based on a common participation in divine life that establishes us as God’s children (3:1). The apostles extend this gift to others by their preaching and sacramental ministry (1 Cor 10:16–17; CCC 425).
1:5 God is light: Means that God is infinite goodness, purity, and truth. darkness: Stands for all things evil and erroneous that are churned out by the devil (Jn 3:19–21). Fellowship with God is impossible unless believers live in the light—loving as God loves and staying pure from sin as God is pure (1 Jn 1:6–7). This black-and-white vision of the world is also shared by the Jewish authors of the Dead Sea Scrolls, who made similar contrasts between spiritual realities in terms of light and darkness.
Today we celebrate the feast of St. John the Apostle and Evangelist. St. John is, of course, a spiritual master, but he is a literary master as well. “On the evening of that first day of the week…” Easter Sunday is new creation day. On the first creation day, God had said, “let there be light,” and now on Easter day, the one who said, “I am the light of the world” has returned from the dead. And this means that everything has changed, everything has been recreated.
– Bishop Robert Barron
May the virtues of faith, hope, and love go with you today – DV.
 The Ignatius Catholic Study Bible: The New Testament (San Francisco: Ignatius Press, 2010), 469.