The call. Peter heard it. Andrew heard it. James and John heard it. But more than hearing, they acted on it - immediately! St. Paul says not everyone hears the call but blessed are the feet of those who bring the gospel, regardless!
One more thing: How many times does Christ call me in a day? Let's see, I have four children, who call out "Mom!" at least 20 times a day so... When my kids call, I often put them off, "Just a minute; I'm busy; Be there in a second!" But Andrew didn't waste a moment following Christ. If motherhood is my God given vocation, I need to be better about answering the daily call!
Prayer: Lord Jesus, I hear you call me and I recognize your voice in my children's needs. Help me to patiently and lovingly answer their call so that I may serve you as the disciples did. In your name I pray, Amen. St. Andrew, pray for me.