The children in school frequently ask me if God can read our minds. Yes, of course! To me it's an easy question (I'm often asked harder ones), and I'm surprised by the students' reactions to that answer. They are taken aback. Really? God knows what I'm thinking?! Yes, he does—he's God. “For God is greater than our hearts and knows everything” (1 Jn 3:20).
Our second reading is from St. John's first letter (he wrote three). In this letter—actually more of a theological treatise than a letter—John lays out the reality that we are privileged to be sons and daughters of God. When we die, we shall be like God, for we shall see him as he is (cf. 1 Jn 3:2).
John says that we show our love for God and others by what we do and what we believe. What we say doesn't matter all that much. Anyone can say “I love you.” The person who sacrifices and lives for someone other than himself is the one who truly loves.