2 and 4 together
The 4 is among the 2’s harmony numbers, and the reverse holds too.
Their relationship rests on a shared idea: you move forward better when you can count on someone. The 2 receives a reassuring framework, promises kept, a readable calendar. The 4 receives warmth, patience, and an attention to others that softens its sometimes austere side.
The weak point of this harmony is its comfort. Two people who love stability can let a life that is too predictable settle in without really having chosen it. The 4 can also seem cold to the 2 when it shows its attachment by doing favors rather than putting it into words. A 22, the expanded form of the 4, brings a broader ambition: the 2 then helps it stay in touch with the people behind the project.