I'll go through this lesson line by line:
Let us today attend the Voice for God, which speaks an ancient lesson, no more true today than any other day. Yet has this day been chosen as the time when we will seek and hear and learn and understand.
Here we get a glimpse into Jesus' motivational approach. There is nothing especially true about this lesson today. It's no more true today than it ever was. Yet today has been chosen as the day in which we'll learn it. Imagine approaching it in this fashion: "This lesson has been true since ancient times. But today is the day that's been appointed for me to finally learn it." Don't you think we would get further with that idea than with this: "It's been true for eons, and in all that time I haven't learned it. What makes me think I will learn it today?"
Join me in hearing.
When we listen to the Voice for God, Jesus is listening with us. This reminds me of the guidance Helen got, in which she was encouraged not so much to listen for guidance for others, but to listen with them, joining them in their act of listening. When we hear the Holy Spirit, that is what Jesus is doing with us. He has joined us in our act of hearing.
For the Voice for God tells us of things we cannot understand alone, nor learn apart. It is in this that all things are protected. And in this the healing of the Voice for God is found.
In different places in the Course, Jesus says that as long as we are alone, we are within the confines of the ego, and in those confines we can't really understand. It's like we are inside a cult compound. Inside that environment, we can't get true perspective. We are surrounded by the warped perspective of the cult. Only when we join with others do we step outside that bubble and only there, from that shared mental space, can we get a true perspective. (See T-14.X.9-11) and T-5.III.4:6.)
Your healing Voice protects all things today, and so I leave all things to You. I need be anxious over nothing.
Imagine being in this state, where you rest on God's Voice, leaving all things to Him, letting Him be in the driver's seat, and as a result, you are anxious over nothing. That second line ("I need be anxious over nothing") is a subtle reference to the lilies of the field discourse, which the Course alludes to many times: "Therefore I tell you, do not be anxious about your life, what you shall eat or what you shall drink, nor about your body, what you shall put on….But seek first his kingdom and his righteousness, and all these things shall be yours as well" (Matthew 6:25, 33).
This captures, I feel, the essence of the lesson for today. I need be anxious over nothing, for I have left everything to God's healing Voice, which surrounds all things and me in Its golden protection.
For Your Voice will tell me what to do and where to go; to whom to speak and what to say to him, what thoughts to think, what words to give the world.
Leaving all things to Him doesn't mean that we are inactive. It means that we let Him decide for us and act through us. He takes care of our speaking ("what to say") and our doing ("what to do"), and even our thinking ("what thoughts to think"). In the early stages of our journey, we have to ask for this gift. In fact, Lesson 71 instructs us to ask for almost this exact same list. But a day comes when this gift becomes involuntary. Our thoughts, words, and deeds flow so spontaneously from the Holy Spirit that we watch ourselves do them, rather than make ourselves do them. Wouldn't that be relaxing?
The safety that I bring is given me. Father, Your Voice protects all things through me.
The immediate reason He moves through us is to extend safety and protection to others. As He guides us to act, they feel watched out for. As He speaks through us, they are set at ease. With us in their midst, they feel God's safety wrap around them. As the Text says, "The protection of God then dawns upon [the mind], assuring it that it is perfectly safe forever" (T-6.III.3:3). What an amazing gift to be able to give to others! Imagine being able to bring this sense of safety to the people in your life. Perhaps you already do at times, maybe more than you realize.
And as we bring a sense of safety to others, it returns to us. As God's Voice protects our brothers through us, we feel protected. After all, how could we be left outside the seamless blanket of protection that we spread over all things?