""This second epistle, beloved, I now write unto you; in both which I stir up your pure minds by way of remembrance: That ye may be mindful of the words which were spoken before by the holy prophets, and of the commandment of us the apostles of the Lord and Saviour: Knowing this first, that there shall come in the last days scoffers, walking after their own lusts, and saying, Where is the promise of His coming? For since the fathers fell asleep, all things continue as they were from the beginning of the creation." 2 Peter 3:1-4
You might know someone that simply doesn't believe or acknowledge that God is real and that our Saviour is alive and well and is working on a daily basis on our behalf. For all those who say, "all things continue as they were from the beginning of the creation" I say, The only thing that has stayed the same is your thinking.
God inhabits the praises of His people.
God answers prayer.
God speaks to His people.
God call out to every living soul (those who have not been saved) to come to His Son for salvation.
God intervenes in the affairs of mankind.
God changes the minds and hearts of men and women.
God alters outcomes through His supernatural intervention.
God blesses people through others and personally.
Those who deny that God exists or that God stopped interacting after creation are mistaken. I'm unwilling to use harsher language than mistaken, because we have all been there at one time. I don't wish any hardships on the unsaved more than any of us have faced, but I also don't want the Christian community to think that silence on the issues concerning God is acceptable. Even Paul said, "and how shall they believe on Him of whom they have not heard?" Romans 10:14
Many people deny God His rightful place in their life. It could be your spouse or one of your parents or one of your children or a friend or co-worker. If you aren't outgoing and wish not to speak about God to others, that's your business, but if the opportunity comes up through conversation and you don't stand up for what you know to be the truth, it's possible that you never really believed the truth, i. e., the truth about Jesus.
You have been elected as God's spokesman/woman for Jesus. You can't stop others from railing on God or speaking their pitiful excuses about why they don't believe in God, but you can stand up for God. You were once lost and destined for hell and now you are saved and your residency is reserved for you in heaven and during this life you have the power of the Holy Spirit within, and in you lives the creator and in you is all the knowledge necessary to become a child of the living God and through you, prayers are answered and by your own words God moves and makes earthly alterations. Just tell them what you know.
And if there is nothing to tell them, I would be praying about that. No Christian should be ignorant of the basic truths that have set us free. If you are the kind of person that goes to church, but you have no real interest in the things of God, you always let someone else do the lion's share of the work and you complain all the time, you should be ashamed. That's not Christianity, that's religion.
It's not your age that has made you apathetic. Moses led the Israelites away from bondage starting at age 85. Why don't you take back some lost ground, claim it for Jesus and plant something, water it, cultivate it and then give away the fruits of it. That's therapy for apathy.