I believe you are asking about the four marks of the Church, not four ways the Church is "one." The four marks are: One, Holy, Catholic, and Apostolic. ("One" is one of the marks.)
1. They were christian.
If by "communities" you mean the 1000+ Christian sects, the one thing they all have in common is their belief in the Holy Trinity: God the Father, God the Son, and God the Holy Ghost/Spirit.
Christian bookstores are located in many communities. The best way to locate your local one is to look in the yellow pages or to contact your local church.
When adopting the ways of Christian Monasticism, one has to renounce worldly pursuits to fully devote oneself to spiritual work. Monastic life plays a very important role in many Christian churches, especially in the Catholic and Orthodox tradition.
one
There are a few ways you could read that number and so a few ways you could spell it: One thousand four hundred. Fourteen Hundred. One four zero zero.
A four on four in hockey can occur two ways: One - one player from each team is in the penalty box Two - in overtime, teams play four on four until one team scores or it goes to a shootout
You can write 4.117 a couple of different ways: Four point one one seven Four and one hundred seventeen thousandths
twelve and four tenths
one two three four five
If the people are always facing forward? 24 ways.
There are many ways in which one can met Christian singles for free. This includes using dedicated online dating sites such as ChristianMingle. Alternatively, one can try using regular sites such as POF and specify that you want to meet a Christian on your profile.