"Let us consider one another in order to stir up love and good works, not forsaking the assembling of ourselves together, as is the manner of some, but exhorting one another, and so much the more as you see the Day approaching" (Hebrews 10:24-25).
You said this: 'There is no true church.
"And I also say to you ... I will build My church, and the gates of Hades [the grave] shall not prevail against it" (Matthew 16:18).
Can branches survive without the vine?
"For as the body is one and has many members, but all the members of that one body, being many, are one body, so also is Christ ... But now God has set the members, each one of them, in the body just as He pleased. And if they were all one member, wherewould the body be? But now indeed there are many members, yet one body ... Now you are the body of Christ, and members individually. And God has appointed these in the church: first apostles, second prophets, third teachers, after that miracles, then gifts of healings, helps, administrations, varieties of tongues" (1 Corinthians 12:12, 18-20, 27-28).
"I am the true vine, and My Father is the vinedresser. Every branch in Me that does not bear fruit He takes away; and every branch that bears fruit He prunes, that it may bear more fruit ... Abide in Me, and I in you. As the branch cannot bear fruit of itself, unless it abides in the vine, neither can you, unless you abide in Me. I am the vine, you are the branches. He who abides in Me, and I in him, bears much fruit; for without Me you can do nothing. If anyone does not abide in Me, he is cast out as a branch and is withered; and they gather them and throw them into the fire, and they are burned. If you abide in Me, and My words abide in you, you will ask what you desire, and it shall be done for you. By this My Father is glorified, that you bear much fruit; so you will be My disciples" (John 15:1-8).