Hi there. BW promotes independent sleep, which means that your lo falls asleep in the crib rather than in your arms. This helps most babies stay asleep longer and prevents problems associated with them becoming dependent on you to get them to sleep.
It's OK to use the rocking chair as part of your wind down ritual. We do, we just don't rock to sleep. Some families do rock to sleep, and don't have problems with it--it's just not what BW recommends or what we promote on this board.
I rocked dd to sleep for the first 5-6 weeks of her life. To begin working on independent sleep I began putting her down more and more awake, beginning by putting her down when she was just barely asleep, then almost asleep then drowsy, etc. When we first started she would generally startle and cry when put down, so we used the pat/shush method. With an older baby, pat/shush may not be enough; if he gets worked up you may need to do pick up/put down (but you may not).