In today's Gospel (Matthew 13: 10-17) Jesus gives the formula or process for coming to a new life. In quoting the prophet Isaiah, he shows that if we see with our eyes, hear with our ears and understand with our hearts, we will be converted and healed. Sounds pretty simple. He also notes that one is blessed if they have eyes that see and ears that hear, because many people do not.
If you accept this process (and I would recommend you do, since it is the Lord himself who is proposing it), then there are two parts to it. The first is to make sure that you keep your eyes and ears open, so that you can see and hear the Lord. Every day, in countless situations, the Lord seeks to interact with us. Through other people, the Lord want us to see Him and hear Him. But if we are not looking for these encounters, we will likely miss them.
The second part is that we have to always look for opportunities to speak God's word to others and show them the example of Christ. You see, we may never know when someone is open to "seeing and hearing". But we just may be the one who speaks the right word to them and shows them the face of Christ. It is really not of our own choosing, but God's when that will occur. What God counts on is our cooperation, which means we have to always try and be the voice and hands of Christ.
Even if someone has had their eyes and ears closed hundreds of times in the past, it just may be the next time we speak with the love of Christ that they are listening, or act as Christ would that they are looking. And for them, we become the means by which they are blessed. But it cannot happen unless we are part of the process.